Experimental study on seismic performance of masonry wall strengthened with sprayed ECC

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Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (8) : 251-258.

EARTHQUAKE SCIENCE AND STRUCTURE SEISMIC RESILIENCE

Experimental study on seismic performance of masonry wall strengthened with sprayed ECC

LI Xiaoqin1， LI Keran1， ZHANG Tian2， XU Wei*1， LIANG Limin3

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Abstract

Engineered Cementitious Composites (ECC) are widely used in structural strengthening due to the characteristics of strain hardening and multiple cracking. However, existing research on ECC strengthening was is mainly manually applied, which is with low retrofitting efficiency. For strengthening a large number of rural masonry structures, the sprayed ECC retrofitting method was investigated. Pseudo-static tests were conducted on four un-strengthened and strengthened masonry walls, which were with,of traditionally manually applied and the new sprayed ECC. The results indicated that the strengthening efficiency of sprayed ECC is 5.27 times that of the manual application. The ECC strengthening layers were are with good adhesion performance to the wall surface, providing effective strengthening effects and improving the non-ductile failure characteristics of the masonry walls. Meanwhile, the strengthening effect of sprayed ECC is comparable to that of manual plastering, where the sprayed ECC strengtheningwhich can effectively enhance the masonry wall’s bearing, deformation and energy dissipation capacities and enhancing enhance the comprehensive seismic performance of the masonry walls.

Key words

Sprayed engineered cementitious composites (ECC) / Masonry walls / Strengthening / Se ismic performance

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LI Xiaoqin1, LI Keran1, ZHANG Tian2, XU Wei1, LIANG Limin3. Experimental study on seismic performance of masonry wall strengthened with sprayed ECC[J]. Journal of Vibration and Shock, 2025, 44(8): 251-258

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